diff --git a/src/main.cc b/src/main.cc
index 87cfdf5..c44cab2 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -10,15 +10,15 @@
 #include <filesystem>
 #include <map>
 #include <set>
+#include <fstream>
+#include <ctime>
 
-// Struct to hold the view and id of each entry
 struct Entry {
     const std::string_view decoded_view;
     const uint64_t id;
     inline Entry(const std::string_view decoded_view, const uint64_t id) : decoded_view(decoded_view), id(id) {}
 };
 
-// Function to remove one UTF-8 character and return the character along with the new string
 inline std::pair<std::string, std::string> remove_one_utf8_char(const std::string& str) {
     if (str.empty()) {
         return {"", str};
@@ -27,13 +27,13 @@ inline std::pair<std::string, std::string> remove_one_utf8_char(const std::strin
     size_t i = 0;
     while (i < len) {
         const unsigned char c = str[i];
-        if (c < 0x80) { // 1-byte character
+        if (c < 0x80) { 
             return {str.substr(i, 1), str.substr(i + 1)};
-        } else if ((c >> 5) == 0x6) { // 2-byte character
+        } else if ((c >> 5) == 0x6) { 
             return {str.substr(i, 2), str.substr(i + 2)};
-        } else if ((c >> 4) == 0xe) { // 3-byte character
+        } else if ((c >> 4) == 0xe) { 
             return {str.substr(i, 3), str.substr(i + 3)};
-        } else if ((c >> 3) == 0x1e) { // 4-byte character
+        } else if ((c >> 3) == 0x1e) { 
             return {str.substr(i, 4), str.substr(i + 4)};
         }
         i++;
@@ -41,13 +41,11 @@ inline std::pair<std::string, std::string> remove_one_utf8_char(const std::strin
     return {"", ""};
 }
 
-// Function to check input from command line or piped input
 inline std::string get_input(const int argc, char* const argv[], const bool goldendict_mode) {
     std::string search_string;
-
-    if (!isatty(fileno(stdin))) { // If input is piped
+    if (!isatty(fileno(stdin))) { 
         std::getline(std::cin, search_string);
-    } else { // If input is provided as command line argument
+    } else { 
         if (goldendict_mode) {
             for (int i = 1; i < argc; ++i) {
                 if (std::strcmp(argv[i], "--sentence") == 0 && i + 1 < argc) {
@@ -64,7 +62,6 @@ inline std::string get_input(const int argc, char* const argv[], const bool gold
                 if (std::strcmp(argv[i], "--debug") == 0) {
                     // Handle debug mode
                 } else if (std::strcmp(argv[i], "--dict") == 0 && i + 1 < argc) {
-                    // Skip the next argument as it's the dictionary file path
                     i++;
                 } else {
                     search_string = argv[i];
@@ -73,12 +70,10 @@ inline std::string get_input(const int argc, char* const argv[], const bool gold
             }
         }
     }
-
     if (search_string.empty()) {
         std::cerr << "Search string not provided." << std::endl;
         exit(1);
     }
-
     return search_string;
 }
 
@@ -106,27 +101,58 @@ inline void print_debug_info(const std::vector<std::string>& substrings, const s
     std::cout << raw_output << std::endl;
 }
 
+
+void log_execution(const int argc, char* argv[], const std::string& search_string, const std::string& dict_file, bool debug_mode, bool goldendict_mode) {
+    std::ofstream log_file;
+    log_file.open("/tmp/hakurei.log", std::ios_base::app);
+    if (!log_file) {
+        std::cerr << "Failed to open log file." << std::endl;
+        return;
+    }
+
+    std::time_t now = std::time(nullptr);
+    log_file << "Hakurei executed at " << std::ctime(&now);
+    log_file << "Command-line arguments:\n";
+    for (int i = 0; i < argc; ++i) {
+        log_file << "argv[" << i << "]: " << argv[i] << "\n";
+    }
+    log_file << "Parsed parameters:\n";
+    log_file << "search_string: " << search_string << "\n";
+    log_file << "dict_file: " << dict_file << "\n";
+    log_file << "debug_mode: " << debug_mode << "\n";
+    log_file << "goldendict_mode: " << goldendict_mode << "\n";
+
+    log_file.close();
+}
+
+
+void log_internal(const std::string& message) {
+    std::ofstream log_file;
+    log_file.open("/tmp/hakurei.log", std::ios_base::app);
+    if (!log_file) {
+        std::cerr << "Failed to open log file." << std::endl;
+        return;
+    }
+    std::time_t now = std::time(nullptr);
+    log_file << std::ctime(&now) << ": " << message << std::endl;
+    log_file.close();
+}
+
+
 inline void wrap_html_output(
-    const std::vector<std::string>& substrings,
-    const std::map<std::string, std::set<std::string>>& alternatives_map,
-    std::string& sentence
+        const std::vector<std::string>& substrings,
+        const std::map<std::string, std::set<std::string>>& alternatives_map,
+        std::string& sentence
 ) {
+    // Log the HTML output call
+    log_internal("<span style=\"color:red;\">HTML output is being called</span>");
+
     std::string output_html;
-    output_html += "<!DOCTYPE html><html><head><style>";
-    output_html += ".hakurei { font-size: 2rem; margin-bottom: 0.05em; margin-top: -0.2em; color: #1268c3; font-weight: normal; }";
-    output_html += ".hakurei a { display: inline-block; font-weight: normal; color: royalblue; text-decoration: none; border-bottom: dashed max(1px, calc(1em / 16)) currentColor; }";
-    output_html += ".hakurei a.hakurei-headword { background-color: #ddeeff; border-radius: 0.2rem; font-weight: 500; }";
-    output_html += ".hakurei > ul { --size: 1rem; font-size: var(--size); padding-inline-start: var(--size); margin-block: 2px; }";
-    output_html += ".hakurei .alternatives { --size: 1rem; display: grid; font-size: var(--size); gap: calc( var(--size) / 4); max-width: 100%; margin: 0 auto; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); align-content: start; justify-content: space-around; text-align: left; padding: 5px 0px; }";
-    output_html += ".hakurei .alternatives > ul { list-style-type: none; margin: 0; padding: calc( var(--size) / 4); background-color: hsl(0 0% 50% / 0.05); box-shadow: 0 0 4px hsl(0 0% 0% / 0.1); border-radius: 0.2rem; }";
-    output_html += ".hakurei .alternatives > ul > li { margin-right: 1rem; }";
-    output_html += ".container { display: flex; flex-wrap: wrap; gap: 10px; }";  // Adjusted container class
-    output_html += ".segment { display: inline-block; }";  // Adjusted segment class
-    output_html += "</style></head><body><div class=\"hakurei\">";
+    output_html += "<div class=\"hakurei\">";
 
     std::string sentence_copy = sentence;
 
-    output_html += "<div class=\"container\">";  // Open container div
+    output_html += "<div class=\"container\">";  
 
     while (!sentence_copy.empty()) {
         bool found = false;
@@ -134,7 +160,6 @@ inline void wrap_html_output(
             if (sentence_copy.rfind(substring, 0) == 0) {
                 output_html += "<div class=\"segment\"><a class=\"hakurei-headword\" href=\"bword:" + substring + "\">" + substring + "</a>";
 
-                // Adding alternatives for the current substring
                 auto alt_itr = alternatives_map.find(sentence_copy);
                 if (alt_itr != alternatives_map.end() && !alt_itr->second.empty()) {
                     output_html += "<div class=\"alternatives\"><ul>";
@@ -144,7 +169,19 @@ inline void wrap_html_output(
                     output_html += "</ul></div>";
                 }
 
-                output_html += "</div>";  // Close segment div
+                output_html += "</div>"; 
+                output_html += "<style>";
+                output_html += ".hakurei { font-size: 2rem; margin-bottom: 0.05em; margin-top: -0.2em; color: #1268c3; font-weight: normal; }";
+                output_html += ".hakurei a { display: inline-block; font-weight: normal; color: royalblue; text-decoration: none; border-bottom: dashed max(1px, calc(1em / 16)) currentColor; }";
+                output_html += ".hakurei a.hakurei-headword { background-color: #ddeeff; border-radius: 0.2rem; font-weight: 500; }";
+                output_html += ".hakurei > ul { --size: 1rem; font-size: var(--size); padding-inline-start: var(--size); margin-block: 2px; }";
+                output_html += ".hakurei .alternatives { --size: 1rem; display: grid; font-size: var(--size); gap: calc( var(--size) / 4); max-width: 100%; margin: 0 auto; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); align-content: start; justify-content: space-around; text-align: left; padding: 5px 0px; }";
+                output_html += ".hakurei .alternatives > ul { list-style-type: none; margin: 0; padding: calc( var(--size) / 4); background-color: hsl(0 0% 50% / 0.05); box-shadow: 0 0 4px hsl(0 0% 0% / 0.1); border-radius: 0.2rem; }";
+                output_html += ".hakurei .alternatives > ul > li { margin-right: 1rem; }";
+                output_html += ".container { display: flex; flex-wrap: wrap; gap: 10px; }";  
+                output_html += ".segment { display: inline-block; }";  
+                output_html += "</style>";
+
                 sentence_copy = sentence_copy.substr(substring.size());
                 found = true;
                 break;
@@ -152,48 +189,66 @@ inline void wrap_html_output(
         }
         if (!found) {
             const auto [removed_char, new_sentence_copy] = remove_one_utf8_char(sentence_copy);
+            if (removed_char.empty()) {
+                std::cerr << "Error: Unable to remove a character from the sentence. Exiting to prevent infinite loop." << std::endl;
+                break;
+            }
             output_html += "<div class=\"segment\">" + removed_char + "</div>";
             sentence_copy = new_sentence_copy;
         }
     }
 
-    output_html += "</div>";  // Close container div
-    output_html += "</div></body></html>";
+    output_html += "</div>";  
+    output_html += "</div>";
     std::cout << output_html << std::endl;
 }
 
 
+
 int main(const int argc, char* argv[]) {
     bool debug_mode = false;
     bool goldendict_mode = false;
     std::string word, sentence;
     std::string dict_file = find_dic_file().string(); // Default dictionary file path
 
+    log_internal("Program started");
+
     // Parse command line arguments
     for (int i = 1; i < argc; ++i) {
         if (std::strcmp(argv[i], "--debug") == 0) {
             debug_mode = true;
+            log_internal("Debug mode enabled");
         } else if (std::strcmp(argv[i], "--dict") == 0 && i + 1 < argc) {
             dict_file = argv[i + 1];
+            log_internal("Dictionary file set to: " + dict_file);
             i++; // Skip the next argument as it's the dictionary file path
         } else if (std::strcmp(argv[i], "--goldendict") == 0) {
             goldendict_mode = true;
+            log_internal("GoldenDict mode enabled");
         } else if (std::strcmp(argv[i], "--word") == 0 && i + 1 < argc) {
             word = argv[i + 1];
+            log_internal("Word set to: " + word);
             i++;
         } else if (std::strcmp(argv[i], "--sentence") == 0 && i + 1 < argc) {
             sentence = argv[i + 1];
+            log_internal("Sentence set to: " + sentence);
             i++;
         }
     }
 
     std::string search_string = get_input(argc, argv, goldendict_mode);
+    log_internal("Search string: " + search_string);
     if (goldendict_mode && !sentence.empty()) {
         search_string = sentence;
+        log_internal("Search string overridden by sentence: " + search_string);
     }
 
+    // Log the execution details
+    log_execution(argc, argv, search_string, dict_file, debug_mode, goldendict_mode);
+
     std::string raw_output;
     const auto trie = xcdat::load<xcdat::trie_15_type>(dict_file);
+    log_internal("Trie loaded from dictionary file");
 
     std::vector<std::string> substrings;
     std::vector<Entry> results;
@@ -205,6 +260,7 @@ int main(const int argc, char* argv[]) {
 
         while (itr.next()) {
             results.emplace_back(itr.decoded_view(), itr.id());
+            log_internal("Found result: " + std::string(itr.decoded_view()));
         }
 
         // Add all substrings to the results
@@ -214,6 +270,7 @@ int main(const int argc, char* argv[]) {
                 substrings.push_back(substring);
                 derived_map[substring].push_back(search_string);
                 alternatives_map[search_string].insert(substring);
+                log_internal("Substring added: " + substring);
                 if (!goldendict_mode) {
                     std::cout << substring << std::endl;
                 }
@@ -222,12 +279,20 @@ int main(const int argc, char* argv[]) {
 
         // Remove one UTF-8 character from the search string and get the removed character
         const auto [removed_char, new_search_string] = remove_one_utf8_char(search_string);
+        log_internal("Removed character: " + removed_char);
 
         if (!removed_char.empty() && !goldendict_mode) {
             std::cout << removed_char << std::endl;
         }
 
+        if (new_search_string == search_string) {
+            std::cerr << "Error: Search string did not change after removing a character. Exiting to prevent infinite loop." << std::endl;
+            log_internal("Error: Search string did not change after removing a character. Exiting to prevent infinite loop.");
+            break;
+        }
+
         search_string = new_search_string;
+        log_internal("New search string: " + search_string);
 
         // Print debug information if in debug mode
         if (debug_mode) {
@@ -249,7 +314,9 @@ int main(const int argc, char* argv[]) {
     // Wrap the output in HTML format for GoldenDict if in GoldenDict mode
     if (goldendict_mode) {
         wrap_html_output(substrings, alternatives_map, sentence);
+        exit(0);
     }
 
+    log_internal("Program finished");
     return 0;
 }